Small fix on down before up

Author: r3nor

mnf

@@ -143,7 +143,7 @@ case "$action" in
           exit 0
         fi
 
-        if $ts ; then
+        if [ $zerotier = false ]; then
             bash $0 down -a || echo "Ignoring error..."
         else
             bash $0 down -a -z || echo "Ignoring error..."